I think the 5" older customs handle well actually. I admit with all the newer (and mostly lighter) stuff coming out they seem cumbersome for a few seconds now..., but still a very nice knife in any profile.
I've only handled two 6" customs <ever>.., and never owned one made in the old PCC/BM Custom Shop, but they felt a little clunky to me, even being used to the heavier B-SC/PCC models of yester-year.
I'm sure glad to see so many intelligent comments about "Baliswords".., because they truly are very dangerous to handle without lots of experience. Even a totally dull blade can break a couple of fingers if you get caught in the channels. I've mentioned once that I have a friend that is very good with Baliswords.., but also has years of training with swords, and is amazing with Balisongs as well.
For those of you going.., Chuck will do a demonstration of some Balisword techniques at the Oregon Show...(April 20 & 21). If I'm not mistaken the show opens for the local Association and dealer/distributors on Friday the 19th at noon (correct me if I'm wrong Chuck). Very cool show.., and lots of Balisongs!!
"Hunters seek what they [WANT].., Seekers hunt what they [NEED]"